This Standard specifies the design and test requirements for bolted explosion-protected three-phase cable coupling devices and adaptors of the pin and socket type, referred to in this Standard as ‘cable coupling devices’, for use with restricted earth-fault systems in mines and quarries. The devices are designed to couple cables together, or to couple a cable to equipment.Cable coupling devices and adaptors constructed to this Standard are not intended to be coupled or uncoupled while the circuit is energized.The Standard covers two types of coupling devices:(a) Type ADesigned according to Figures in this Standard that prescribe the dimensions necessary to interconnect cable coupling devices from different manufacturers.(b) Type BDesigned to dimensions that are not compatible with Type A coupling devices. Type B couplers cannot be directly coupled to Type A coupling devices under normal operation. Type B plugs and receptacles do not comply with Figures 4.1 to 4.5 but comply with all other requirements of this Standard. Where there is a variation to a particular clause for Type B plugs and receptacles it is specifically stated. The use of transition devices between Type A and Type B systems is permitted.This Standard also deals with some electrical and mechanical requirements, including the provision of earthed phase barriers to protect against interphase faults. It does not specify fully detailed designs.NOTES:Appendix A lists the information a user should provide with any enquiry or order.Appendix C lists the information that should be supplied by the designer or manufacturer.